Lock unit



FIG. 1 is a front elevational view of the lock unit showing my newdesign;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a perspective exploded view thereof.

The ornamental design for a lock unit, as shown and described.